Having updated both the theme & support plugins, I now cannot access my WordPress site, until removing the support plugin via my hosting site, then find the customiser locks up the site on clicking the X (exit)

Having just paid for the update of my licences, yet cannot work with the software provided

We are not getting other reports of this sort of behavior, so there should be a way to get these working again.

First, you have not given much information.

But something else must have changed other than a simple update of Weaver Xtreme and support plugin. Perhaps your host updated to a newer version of PHP? Perhaps some of the PHP memory limits were changed (this is the only know reason known to make the Customizer have issues.)

Try switching to another theme (such as a WP Twenty-something theme), deleting the Weaver theme and plugins, then reinstalling them. You should not lose any information as the settings are stored in the WP database. Since you can’t get the support plugin to work, then you can’t save settings to your own computer.

Another thing to try (perhaps first) it so examine the errorlog file on you host for this domain. That may have messages that show where things are failing.

I have now updated other sites to Extreme Theme 3.1.12, Extreme Plus 3.1.1 and Theme support 3.1.11 and found that Theme support on any update since 3.1.8 brings up an Internal Server Error and states it is unable to complete my request

Thanks – I don’t understand what the issue might have been as the current versions of Weaver and plugins work under PHP 5.4. But good to know that for once, an upgrade to a newer version of PHP fixes things instead of breaking them!